Enter the "Rewards" menu. Enter the appropriate section, highlight one of the following options, then enter the code when prompted to unlock the corresponding item. If you entered the code correctly, you will hear a sound.

Costumes (Heroes): Baseball shirt Drake

Press Left, Right, Down, Up, Triangle, R1, L1, Square. Note: The game must first be completed in order to switch costumes.

Making A Cutscene: Time's Up

Press L1, Right, Square, Down, Left, Triangle, R1, Up.

Making A Cutscene: Grave Robbing

Press Left, R2, Right, Up, L2, Triangle, Square, Down.

Concept Art: Bonus 1

Press L2, Right, Up, Square, Left, Triangle, R1, Down.

Concept Art: Bonus 2

Press Square, L1, Right, Left, Down, R2, Triangle, Up.

Infinite ammunition

Get over 300 medal points, then press Start and enter the "Rewards" menu. Choose the "Weapon Select" option and pick from the available weapons. You will get a weapon with full ammunition. Then, re-enter that menu and repeatedly select and deselect that weapon to keep refilling its ammunition.

Crushing mode

Successfully complete the game on the Hard difficulty setting without changing the difficulty setting at any time to unlock the Crushing difficulty setting.

Library puzzle solution

When you enter the room where Sully is associating with the crooks, you will first have to kill all the guards. Afterwards, you will have to solve a puzzle with the statues in the center of the room. Press Select to enter Sir Francis Drake's diary. You will see that the four statues are next to either north, south, east, or west. Then, exit the diary. The center of the room has a compass painted on the stone. You must turn the statue to the same direction indicated on the compass. Once completed, a secret door will open.

All treasures and strange relic locations

Search the indicated locations to find all 60 treasures and one strange relic. You can get missing treasures using chapter select at any time. The treasures are saved automatically when collecting them -- so there is no need to reach the next checkpoint. At the pause menu under the "Bonuses" option, you can view which treasures you have found. There is also a collectible counter in chapter select to help you figure the the treasures missing. The strange relic is found in Chapter 5 (see 10:31 in the video).

Medals

Successfully complete the indicated task to unlock the corresponding medal:

10 Headshots: Kill 10 enemies with headshots.

20 Kills Desert-5: Kill 20 enemies using the Desert-5.

20 Kills Mk-NDI: Kill 20 enemies using Mk-NDI grenades.

20 Kills Wes-44: Kill 20 enemies using the Wes-44.

30 Headshots: Kill 30 enemies with headshots.

30 Kills Dragon Sniper: Kill 30 enemies using the Dragon Sniper.

30 Kills M79: Kill 30 enemies using the M79.

30 Kills MP40: Kill 40 enemies using the MP40.

50 Kills 92FS-9mm: Kill 50 enemies using the 92FS-9mm.

50 Kills AK47: Kill 50 enemies using the AK47.

50 Kills M4: Kill 50 enemies using the M4.

50 Kills Micro-9mm: Kill 50 enemies using the Micro-9mm.

50 Kills Moss-12: Kill 50 enemies using the Moss-12.

50 Kills PM-9mm: Kill 50 enemies using the PM-9mm.

50 Kills SAS-12: Kill 50 enemies using the SAS-12.

100 Headshots: Kill 100 enemies with headshots.

Advanced Fortune Hunter: Obtain 35 treasures.

Beginner Fortune Hunter: Obtain five treasures.

Brutal Brawler: Kill 5 enemies using Brutal Combo.

Brutal Expert: Kill 5 enemies in a role using Brutal Combo.

Brutal Slugger: Kill 20 enemies using Brutal Combo.

Charted!-Crushing: Complete every chapter with Crushing difficulty.

Charted!-Easy: Complete every chapter with Easy difficulty.

Charted!-Hard: Complete every chapter with Hard difficulty.

Charted!-Normal: Complete every chapter with Normal difficulty.

Crack Fortune Hunter: Obtain 55 treasures.

Dyno-Might!: Kill 3 enemies with a single explosion.

Enthusiastic Fortune Hunter: Obtain 15 treasures.

Expert Dyno-Might: Kill 3 enemies with a single explosion five times.

Expert Fortune Hunter: Obtain 50 treasures.

First Treasure: Obtain one treasure.

Grenade Hangman: Kill 10 enemies using grenades while hanging from a ledge.

Hangman: Kill 10 enemies using firearms while hanging from a ledge.

Headshot Expert: Kill 5 enemies in a row with headshots.

Intermediate Fortune Hunter: Obtain 20 treasures.

Master Fortune Hunter: Obtain 60 treasures.

Novice Fortune Hunter: Obtain ten treasures.

Professional Fortune Hunter: Obtain 40 treasures.

Proficient Fortune Hunter: Obtain 30 treasures.

Relic Finder: Obtain the Strange Relic.

Run-and-Gunner: Kill 20 enemies using firearms without aiming with L1.

Senior Fortune Hunter: Obtain 45 treasures.

Skilled Fortune Hunter: Obtain 25 treasures.

Stealth Attacker: Kill 20 enemies using melee from behind.

Steel Fist: Kill 5 enemies with a single punch after weakening them with gunfire.

Steel Fist Expert: Kill 5 enemies in a row with a single punch after weakening them with gunfire.